SELECT `CHARACTER_SET_NAME` AS `Charset`, `DEFAULT_COLLATE_NAME` AS `Default collation`, `DESCRIPTION` AS `Description`, `MAXLEN` AS `Maxlen` FROM `information_schema`.`CHARACTER_SETS`
MySQL 返回：
#1449 - The user specified as a definer ('mysql.infoschema'@'localhost') does not exist
1045: Access denied for user 'pma'@'192.168.30.20' (using password: YES)
